Adjustable transmission appliance



Jan. 5, 1932. B. GROSSBARD 1,839,670

ADJUSTABLE TRANSMI S SI ON APPLIANCE Filed March 14, 1928 IN VENTOR. BARHET GRUJJMRD A TTORNE Y5.

Patented Jan. 5, 1932 WED STATES BARNET GBOSSBABD, OF SAN FRANCISCO, CALIFORNIA ADJUSTABLE TRANSMISSION APPLIANCE Application filed March 14, 1928. Serial No. 261,391.

This invention relates to improvements in transmission appliances of the kind used for transmitting power from a power driven shaft to a mechanism to be operated.

An object of my invention is toprovide a transmission appliancehaving a construction adapted to lit motors of various sizes.

Another object of my invention is to provide a transmission appliance having a construction wherein the loss of power resulting from friction is reducedto a minimum.

Another object of my invention is to provide a transmission appliance embodying a construction adapted to support amotor as well as a clutch mechanism for transmitting motion from the motor to a machine to be operated, the appliance being so constructed as to permit the motor and clutch mechanism to be attached to the machine as a unit.

A further object of my invention is to provide a transmission appliance embodying a novel clutch mechanism for transmitting rotary motion from a driving wheel to a fly wheel revolvably mounted on a stationary shaft.

Other objects more or less apparent will present themselves or will be specifically pointed out in the description to follow.

In the accompanying drawings showing the preferred embodiment of my invention,

Fig. l is a side view of my improved transmission appliance showing a part thereof broken away and the clutch mechanism in cross section; and

Fig. 2 is a bottom view of the supporting structure of my transmission appliance.

Referring to the drawings, the numeral 1 represents a topmember attachable by bolts or screws to the supporting structure of a machine to be operated. The top member is secured to or is formed integrally with a downwardly extending curved leg 2 which is attached at its end by bolts-or screws to a horizontally disposed support 3. The support 3 is provided at one of its ends with an upright member 4 and with an elongated slot 5 which commences at a point adjacent the upright member and extends for a distance toward the opposite end of the support.

Resting on the support 3 and attached theretoas by bolts, is a motor 6 which .is provided with a shaft 7 Detachably secured'to the shaft as by a set' screw 8 is a wheel 911wing a beveled gripping pad 10 secured to its inner surface by suitable means such as screws.

Revolvably mounted on a shaft 11 which is not adapted to turn, is afiy'wheel 12 having a circular projection 18 extending therefrom and around the shaft but in spaced relation to the latter. Secured to the fly wheel as by screws, is a wheel 1% over which may be'positioned an endless belt for attachment to a machine to be operated. Located between the circular-projection 13 and the shaft 11 is a bearing member comprised of two separated pairs of rings 15 having ball bearings 16 movably' positioned between them; The

shaft 11 is provided with a collar 17 which serves to maintain the pairs of rings 15 in separated'positions, while" a metal plate18 secured to the fly wheel 12 at a point opposite the end of the shaft servesto prevent.

one pairof the rings from being removed from itsposition around the shaft. The

other pair of rings is maintained in position around" the shaft by two co-operating ring 5 shaped nuts 19 which are screwed into the end of'the circular projection 13.

The shaft llis slidably'locatedinside a bushing 20, and the 1 bushing, shaft and fly wheel areadjustably supported on the up-- right member 4 by a bar 21. The bar 21 is provided with a vertically' disposed slot, and

a screw22 extends through the latter and enters a threaded hole locatedinthemember 4, thereby providing adjustable means for lowering and raising the fly wheel 12 to position it in proper operating positions for motors ofodifferent sizes. v

Thebar 21 isprovided'atsits lower end with two separated projections 23, and pivotally attached to the projections as by a pin 24: is a lever member 25. A set screw 26 eX- tending into the lever memberland against the pin 2 1 serves to prevent the latter from becoming detached from the projections 23.

The .lever member is provided with an upwardly extending part 27 having a forked end 28 which extends through two slots'29 10-- cated in the end of the shaft 11. Located around the end part of the shaft 11 with one of its ends bearing against the forked end 28 of the lever member and its other end bearing against the circular part of the bar 21, is a spiral spring 30 which tends to force the forked end 28 outwardly to prevent the wheel 12 from contacting with the gripping pad 10 of the driving wheel 9.

The'lever member curves upwardly as at 31, within the slot 5, and: is provided thereon with a pad 32 which may be adjust- 7 ed through a set screw 33; The pad serves to stop the rotary motion of the fiy wheel 12 by its contact therewith when'the horizontally extending part of the lever member 25 is moved upwardly by the pressure of the spring against the forked end 28 of the said lever member.

An operating rod 84: attached to the end of the lever member 25 when pulled downwardc ly moves the lever member on its pivot 24:, thereby moving the upwardly extending part 27 and the forked end 28 inwardly. V The movement of theforked end against the sides of the slot 29, forces the shaft 11 and the fly wheel 12 toward the driving wheel 9,

thereby bringing the said fly wheel into contact with the gripping pad 10. The fly wheel upon contacting with the gripping pad 10 is rotated through its bearings on the shaft 11. Upon releasing the downward pull on the operating rod 34 the spring 30 forces the forked end 28 outwardly against the sides of the slot 29, thereby causing the said forked end to carry with it the shaft 11 and the. fly wheel 12.

It will be observed that the motor and transmitter may be detached as a unit from the leg 2 by unfastening the bolts securing the support 3 to the leg. Through the adjustment of the position of the bar 21 on the of said axially movable shaft, a brake on said lever; said brake being adapted to be moved into engagement with said driven wheel, and a spring on said non-revolvable shaft in engagement with said lever for constraining axial movement of said last named shaft and for urging said brake into engagement with said driven wheel.

2. A transmission appliance comprising a motor having a driving shaft, a driving wheel on said shaft ,an axially: movable, non-revolvable shaft, a bear ng on said non-revolvable shaft, rldllVGH wheel on said bearing, a umtary frame for supporting said driving shaft and said non revolvable shaft in axial align- 1 .ment, means for adjustably positioning said axially movable shaft relative tosaid frame, a lever pivotally connected to said frame and in engagement with said non-revolvable shaft for axially moving said non-revolvable shaftwhereby said wheels are brought into driving contact, said lever serving to prevent rotational movement of said axially movable shaft, a brake on said lever; said brake being adapted to be moved into engagement with said driven wheel, and a spring on said non-revolvable shaft in engagement with said lever for constraining axial movement of said last named shaft and for urging said brake into engagement with said driven wheel.

' BARNET GROSSBARD.

upright member/i, the fly wheel 12, the lever 25, the shaft 11 and the pad 32 may be moved as a unit, thereby providing a novel transmission construction which can be readily adjusted to fit motors of different sizes.

located in the slots 29 of the shaft 11, prevents the latter from revolving with the fly The l forked end 28 of the lever member 27, being in axial alignment, a lever pivotally connected to said frame and in engagement with 7 .said non-revolvable shaft for axially moving said non-revolvable shaft whereby said I wheels are brought into driving contact, said lever serving to preventrotational movement 

